>Hi.
> We have two properties ("prop1", "prop2") that references the same object
>in this way:
>
> ***************
> obj.prop1=createObject("myobject")
> obj.prop2=obj.prop1
> ***************
>
> When we are destroying the object "obj", we need to know who has been the
>creator of the object "myobject". Are there any differences between
>"obj.prop1" and "obj.prop2" for solving this question.

Nope, the's no difference and there's even no relationship between 'obj' object and the one which reference is stored in those properties.